What is f30001 fault in siemens drive?

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Troubleshooting the F30001 fault on Siemens G120/S120 drives. Learn how to identify if the issue is a motor short, a parameter mismatch, or a failed Power Module.

 


Siemens F30001: Understanding the Overcurrent Trip

If your Siemens SINAMICS display just turned red with F30001, the drive has hit its absolute hardware current limit. Unlike a standard "Overload" (which is a slow thermal warning), F30001 is an instantaneous trip. The drive has detected a current spike so high that it had to shut down the IGBTs immediately to prevent them from literal physical destruction.

Top 3 Causes of F30001

When F30001 strikes, you need to look at three distinct areas: the Load, the Cables, and the Drive.

1. Mechanical "Shock" or Jam

If a conveyor jams or a pump tries to start against a closed valve, the motor will attempt to pull massive torque instantly. This surge in current can cross the F30001 threshold before the drive’s software-based current limits can even react.

2. Ground Faults or Phase-to-Phase Shorts

A "hard" short circuit is the most common electrical cause.

  • The Motor: Insulation breakdown in the windings.

  • The Cable: A nicked jacket in the conduit or a loose connection at the terminal block.

3. Power Module Failure

If the internal IGBTs (the power transistors) inside the Siemens unit have failed, they often fail in a "shorted" state. In this case, the drive will trip on F30001 the second you give it a run command, even if the motor is disconnected.

The Troubleshooting "Battle Plan"

Step 1: The "Air" Test (Isolation)

This is the fastest way to see if your Siemens drive is actually broken.

  1. Disconnect the motor cables from the U2/V2/W2 terminals of the Power Module.

  2. Clear the fault and attempt to start the drive at a low frequency (e.g., 5Hz).

  3. The Result: * If it still trips on F30001: The Power Module is defective. It’s time for a spare part.

    • If it runs without tripping: The drive is healthy. The fault is in your cable or motor.

Step 2: Check the "Current Limit" Parameters

Sometimes, F30001 is just a setup error. In TIA Portal or Starter, check:

  • p0640: Current limit (A). If this is set too low relative to the motor's actual needs during startup, it can cause nuisance tripping.

  • p0305: Motor rated current. Ensure this matches the motor nameplate exactly.

Step 3: Pulse Frequency and Ramps

If the trip happens only during acceleration:

  • Increase the acceleration ramp time (p1120).

  • Check if p1300 (Control Mode) is set correctly. If you are in Vector Control without proper motor ID (tuning), the drive might "mis-fire" the current.

 

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